<template>
  <el-menu
      default-active="1-4-1"
      class="el-menu-vertical-demo"
      @open="handleOpen" @close="handleClose"
      :collapse="isCollapse"
      background-color="#545c64"
      text-color="#fff"
      active-text-color="#ffd04b">
    <h3>瑞和图书馆系统管理</h3>
    <el-menu-item v-for="item in noChildren" :key="item.name" :index="item.name">
      <i v-bind:class=" 'el-icon-'+item.icon "></i>
      <span slot="title">{{item.label}}</span>
    </el-menu-item>
    <el-submenu v-for="item in hasChildren" :key="item.label" :index="item.label">
      <template slot="title">
        <i :class=" 'el-icon-'+item.icon "></i>
        <span slot="title">{{item.label}}</span>
      </template>
      <el-menu-item-group v-for="subitem in item.children" :key="subitem.name"  :index="subitem.name">
        <el-menu-item :index="subitem.name">{{subitem.label}}</el-menu-item>
      </el-menu-item-group>
    </el-submenu>
  </el-menu>
</template>


<style lang="less" scoped>
.el-menu-vertical-demo:not(.el-menu--collapse) {
  width: 200px;
  min-height: 400px;
}
.el-menu{
  height: 100vh;
  h3{
  color: #fff;
    text-align: center;
    line-height: 48px;
    font-size: 16px;
    font-weight: 400;
}
}
</style>

<script>
export default {
  data() {
    return {};
  },
  methods: {
    handleOpen(key, keyPath) {
      console.log(key, keyPath);
    },
    handleClose(key, keyPath) {
      console.log(key, keyPath);
    },
    // 点击菜单
    clickMenu(item) {
      console.log(item)
      // 当页面的路由与跳转的路由不一致才允许跳转
      if (this.$route.path !== item.path && !(this.$route.path === '/home' && (item.path === '/'))) {
        this.$router.push(item.path)
      }
      this.$store.commit('selectMenu', item)
    }
  },
  computed:{
    //沒有子菜單
    noChildren(){
      return this.menuData.filter(item =>!item.children)
    },
    //有子菜單
    hasChildren(){
      return this.menuData.filter(item =>item.children)
    },
    menuData() {
      // 判断当前数据,如果缓存中没有,当前store中去获取
      //return JSON.parse(Cookie.get('menu')) || this.$store.state.tab.menu
    },
    isCollapse() {
      //return this.$store.state.tab.isCollapse
    }
  }
}
</script>
<style lang="less" scoped>
.el-menu {
  border-right: none;
}
</style>